Thomas and West (1991) reported that, although old-growth stands of 

 timber had much greater bat activity than other forest stands, Myotis 

 species did not appear to forage there. In some cases, they 

 reported, feeding rates were dramatically greater over water. Though 

 insect density was similar in forested and lacustrine habitat, Lunde 

 and Harestad ( 1986 ) found bat activity 75 times greater in the 

 lacustrine habitat. They reported no bat activity in cutover forest 

 though insects were abundant in that habitat. 



Cave and adit surveys 



Seven caves and several abandoned mine adits on the Deerlodge 

 National Forest were searched for evidence of bat use during the 

 summer of 1991. No summer roosting sites were located in these caves 

 or adits. However, bats could be using any of these as autumn 

 swarming locations, or winter hibemacula, and this possibility 

 cannot be ruled out until all are surveyed at appropriate times (in 

 southwestern Montana, late Septonber to mid-October for elevations 

 above 5(XX) ' , 3 weeks later for lower elevations ) . 



SUNWARY 



Six species of bats, representing four genera, were documented by 



capture during this phase of the study. These were the Big brown bat 



(Eptesicus fuscus), the Little brown bat {Myotis lucilugfus) , the Yuma 



bat {Myotis yumanensis), the Long-eared myotis {Myotis evotis), the 



Hoary bat (I-asiurus clnereus), and the Silver-haired bat 



( Lasionycteris roctivagans ) . 



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